<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input type="checkbox" v-model="checked" /><span>全选</span></th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>

      <GouWu :arr="goodList" @delItem="delFn"></GouWu>

      <HeJi :sum="sPrice"></HeJi>
    </table>
  </div>
</template>

<script>
import HeJi from "./components/HeJi.vue";
import GouWu from "./components/GouWu.vue";
export default {
  components: { HeJi, GouWu },
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  methods: {
    delFn(index) {
      this.goodList.splice(index, 1);
    },
  },
  computed: {
    sPrice() {
      let sumList = this.goodList.filter((item) => {
        return item.checked == true;
      });
      return sumList.reduce((sum, item) => {
        return sum + item.price * item.num;
      }, 0);
    },
    checked: {
      set(val) {
        this.goodList.forEach((item) => {
          item.checked = val;
        });
      },
      get() {
        return this.goodList.every((item) => {
          return item.checked !== false;
        });
      },
    },
  },
};
</script>

<style>
</style>